C++ (Cpp) gst_egl_image_new_wrapped примеры использования

Пример #1

Файл: gsteglimage.c Проект: justinjoy/gst-plugins-bad

GstEGLImage *
gst_egl_image_from_dmabuf (GstGLContext * context,
    gint dmabuf, GstVideoInfo * in_info, gint plane, gsize offset)
{
  GstGLContextEGL *ctx_egl = GST_GL_CONTEXT_EGL (context);
  gint fourcc;
  gint atti = 0;
  EGLint attribs[13];
  EGLImageKHR img = EGL_NO_IMAGE_KHR;
  GstVideoGLTextureType type;

  fourcc = _drm_fourcc_from_info (in_info, plane);
  type =
      gst_gl_texture_type_from_format (context, GST_VIDEO_INFO_FORMAT (in_info),
      plane);

  GST_DEBUG ("fourcc %.4s (%d) plane %d (%dx%d)",
      (char *) &fourcc, fourcc, plane,
      GST_VIDEO_INFO_COMP_WIDTH (in_info, plane),
      GST_VIDEO_INFO_COMP_HEIGHT (in_info, plane));

  attribs[atti++] = EGL_WIDTH;
  attribs[atti++] = GST_VIDEO_INFO_COMP_WIDTH (in_info, plane);
  attribs[atti++] = EGL_HEIGHT;
  attribs[atti++] = GST_VIDEO_INFO_COMP_HEIGHT (in_info, plane);

  attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
  attribs[atti++] = fourcc;

  attribs[atti++] = EGL_DMA_BUF_PLANE0_FD_EXT;
  attribs[atti++] = dmabuf;

  attribs[atti++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
  attribs[atti++] = offset;
  attribs[atti++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
  attribs[atti++] = GST_VIDEO_INFO_PLANE_STRIDE (in_info, plane);

  attribs[atti] = EGL_NONE;

  for (int i = 0; i < atti; i++)
    GST_LOG ("attr %i: %08X", i, attribs[i]);

  g_assert (atti == 12);

  img = ctx_egl->eglCreateImage (ctx_egl->egl_display, EGL_NO_CONTEXT,
      EGL_LINUX_DMA_BUF_EXT, NULL, attribs);

  if (!img) {
    GST_WARNING ("eglCreateImage failed: %s",
        gst_gl_context_egl_get_error_string (eglGetError ()));
    return NULL;
  }

  return gst_egl_image_new_wrapped (context, img, type,
      GST_VIDEO_GL_TEXTURE_ORIENTATION_X_NORMAL_Y_NORMAL,
      (GstEGLImageDestroyNotify) _destroy_egl_image, NULL);
}

Пример #2

Файл: gstglmemoryegl.c Проект: luisbg/gst-plugins-bad

static gboolean
_gl_mem_create (GstGLMemoryEGL * gl_mem, GError ** error)
{
    GstGLContext *context = gl_mem->mem.mem.context;
    GstGLContextEGL *ctx_egl = GST_GL_CONTEXT_EGL (context);
    const GstGLFuncs *gl = context->gl_vtable;
    GstGLBaseMemoryAllocatorClass *alloc_class;

    if (!gst_gl_context_check_feature (GST_GL_CONTEXT (context),
                                       "EGL_KHR_image_base")) {
        g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_WRONG_API,
                     "EGL_KHR_image_base is not supported");
        return FALSE;
    }

    alloc_class = GST_GL_BASE_MEMORY_ALLOCATOR_CLASS (parent_class);
    if (!alloc_class->create ((GstGLBaseMemory *) gl_mem, error))
        return FALSE;

    if (gl_mem->image == NULL) {
        EGLImageKHR image = ctx_egl->eglCreateImageKHR (ctx_egl->egl_display,
                            ctx_egl->egl_context, EGL_GL_TEXTURE_2D_KHR,
                            (EGLClientBuffer) (guintptr) gl_mem->mem.tex_id, NULL);

        GST_TRACE ("Generating EGLImage handle:%p from a texture:%u",
                   gl_mem->image, gl_mem->mem.tex_id);

        if (eglGetError () != EGL_SUCCESS) {
            g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
                         "Failed to create EGLImage");
            return FALSE;
        }

        gl_mem->image = gst_egl_image_new_wrapped (context, image, 0, 0,
                        NULL, (GstEGLImageDestroyNotify) _destroy_egl_image);
    } else {
        gl->ActiveTexture (GL_TEXTURE0 + gl_mem->mem.plane);
        gl->BindTexture (GL_TEXTURE_2D, gl_mem->mem.tex_id);
        gl->EGLImageTargetTexture2D (GL_TEXTURE_2D,
                                     gst_egl_image_get_image (GST_EGL_IMAGE (gl_mem->image)));
    }

    return TRUE;
}